Question: What is the operator and manufacturer of Boeing B-52 Stratofortress?
Paraphrase: Who operates and manufactures the Boeing B-52 Stratofortress?
SPARQL (Wikidata): SELECT ?ans_1 ?ans_2 WHERE { wd:Q174534 wdt:P137 ?ans_1 . wd:Q174534 wdt:P176 ?ans_2 }
Answer: Boeing, United States Air Force, Boeing, NASA